three light dash question

[dcmc]

I have several original three light dash covers, the norm seems to be two red indicator lenses and a turquoise blue in the center, I recently got an original paint unaltered, dash cover that has an oem green indicator lens in the center. Was there a model year change to the green lens.
Was this a police dash ? Thanks to all the experts on the site.

[upsrod]

I have seen an original '67 3 light with a clear gen light, a green (as shown) and a tomato red instead of a cherry (darker) red oil light.

[vph-d]

I think the center lens fades in sunlight.
VPH-D

[Chris Haynes]

I can't tell you the color, but they look to be clear.

[dcmc]

I know the red lenses fade, just wanted to know if there was some documentation or reason for different neutral lens colors

[upsrod]

Simply different suppliers!